# NTSB investigations: Amateur-built UNKNOWN ENG, WY NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports. ## Latest cases - [NTSB WPR25LA201](https://openairdocs.org/ntsb/WPR25LA201.md): Lancair IV · Alpine, WY · Accident · Minor injuries · Class 4 · Limited · Final report · Jun 30, 2025 · N124GH · Substantial damage > The pilot’s loss of visual reference during the landing approach which resulted in a collision with water. - [NTSB WPR19LA029](https://openairdocs.org/ntsb/WPR19LA029.md): BKF Backcountry Supercub · Casper, WY · Accident · No injuries · Class 3 · Limited · Final report · Nov 19, 2018 · N59BK · Substantial damage > The seizure of two bearings in the reduction gearbox, resulting in the total loss of engine power. Contributing to the accident was a high descent rate which resulted in a hard landing. - [NTSB GAA17CA512](https://openairdocs.org/ntsb/GAA17CA512.md): Aviat A 1 · Cody, WY · Accident · No injuries · Data collection · Final report · Aug 28, 2017 · N335SB · Substantial damage > The pilot’s failure to maintain directional control during the landing roll. - [NTSB GAA17CA251](https://openairdocs.org/ntsb/GAA17CA251.md): Bender Joseph KIT Rotoway · Wheatland, WY · Accident · No injuries · Data collection · Final report · Apr 30, 2017 · N164JB · Substantial damage > The pilot's decision to operate the helicopter in gusting wind and high-density altitude conditions and his positioning of the helicopter such that it resulted in a right quartering tailwind, which resulted in a loss of helicopter control due to a loss of… - [NTSB WPR13FA405](https://openairdocs.org/ntsb/WPR13FA405.md): Kamtz RV-7A · Jackson Hole, WY · Accident · 2 fatal · Field investigation · Final report · Sep 11, 2013 · N820RV · Substantial damage > A loss of engine power for reasons that could not be determined because postaccident examination revealed no mechanical malfunctions or failures that would have precluded normal operation. Also causal was the pilot’s failure to adequately compensate for the… - [NTSB WPR11CA399](https://openairdocs.org/ntsb/WPR11CA399.md): Richmond Jim R CCK-1865 · Dubois, WY · Accident · No injuries · Data collection · Final report · Aug 12, 2011 · N56WY · Substantial damage > The pilot's failure to maintain clearance from a wire during cruise flight. - [NTSB WPR11LA280](https://openairdocs.org/ntsb/WPR11LA280.md): Inhofe/ Davis Vans RV-8 · Sheridan, WY · Accident · No injuries · Limited investigation · Final report · Jun 22, 2011 · N4546Y · Substantial damage > The pilot's inadequate directional control during the landing roll. - [NTSB DEN05LA059](https://openairdocs.org/ntsb/DEN05LA059.md): Bourgeois-Avid Flyer MK IV · Kaycee, WY · Accident · 1 fatal · Limited investigation · Final report · Feb 26, 2005 · N94B · Substantial damage > the pilot's failure to maintain airspeed which resulted in a stall. - [NTSB DEN03FA138](https://openairdocs.org/ntsb/DEN03FA138.md): Wright Hughes 1-B · Yellowstone Nat, WY · Accident · 1 fatal · Field investigation · Final report · Aug 5, 2003 · N258Y · Destroyed > The in-flight loss of a propeller counterweight, followed by the pilot's loss of aircraft control during a forced landing attempt and subsequent inadvertent stall/spin to the ground. - [NTSB DEN03FA125](https://openairdocs.org/ntsb/DEN03FA125.md): CASA 2.111 · Cheyenne, WY · Accident · 2 fatal · Field investigation · Final report · Jul 10, 2003 · N72615 · Destroyed > A loss of engine power for reasons undetermined, and the pilot's failure to maintain aircraft control. Contributing factors were the unsuitable terrain on which to make a forced landing, low airspeed, the fence, automobile, and the school bus wash barn. - [NTSB FTW98FA354](https://openairdocs.org/ntsb/FTW98FA354.md): Mooney M20J · Centennial, WY · Accident · 1 fatal · Field investigation · Final report · Aug 4, 1998 · N5698L · Destroyed > The pilot's disregard of information provided in weather briefs, and his flight into known adverse weather in mountainous terrain which resulted in an in-flight collision with a mountain. Factors were rain and low ceiling/visibility. - [NTSB FTW97LA337](https://openairdocs.org/ntsb/FTW97LA337.md): Piper PA-22 · Saratoga, WY · Accident · No injuries · Limited investigation · Final report · Sep 3, 1997 · N8731C · Substantial damage > The pilot's failure to consult airplane performance data based upon the weather conditions that prevailed. Factors were terrain induced turbulence and high density altitude. - [NTSB SEA96LA191](https://openairdocs.org/ntsb/SEA96LA191.md): Champion 7ECA · Lander, WY · Accident · No injuries · Limited investigation · Final report · Aug 19, 1996 · N9542S · Substantial damage > the pilot's failure to maintain directional control of the airplane during the landing roll. Factors relating to the accident were: the variable and gusty wind conditions. - [NTSB SEA92LA169](https://openairdocs.org/ntsb/SEA92LA169.md): Greth Cirrus VK30 · Rawlins, WY · Accident · No injuries · Limited investigation · Final report · Jul 29, 1992 · N303VK · Substantial damage > The pilot in command's failure to maintain control of the aircraft. Factors contributing to the accident were: crosswinds and gusts. - [NTSB SEA91LA106](https://openairdocs.org/ntsb/SEA91LA106.md): Beech A36 · Rawlins, WY · Accident · No injuries · Limited investigation · Final report · May 16, 1991 · N6724T · Substantial damage > The pilot's lack of familiarity with the aircraft, his lack of understanding of the electrical system, and a premature precautionary landing. Contributing to the accident were an alternator failure and the resultant false readings of the powerplant… - [NTSB DEN89LA165](https://openairdocs.org/ntsb/DEN89LA165.md): Henry Vickers HCV-110 · Newcastle, WY · Accident · Minor injuries · Limited investigation · Final report · Jul 4, 1989 · N4831N · Substantial damage > The failure to the magneto. The selection of a powerplant with a single magneto system was an improper choice and directly contributed to the cause. The pilot's misjudgement of the wind for the approach to a forced landing resulted in an improper ground… - [NTSB DEN86FTI01](https://openairdocs.org/ntsb/DEN86FTI01.md): Miller Sievers Special · Gillette, WY · Accident · Minor injuries · Final report · Mar 4, 1986 · N1175 · Substantial damage > On March 3, 1986 at approximately 1715 MST, an experimental Miller, sievers special, struck the ground during takeoff at the Gillette-campbell county airport, Gillette, Wyoming. The pilot stated that just after takeoff on runway 34, the aircraft appeared to… - [NTSB DEN74DTC40](https://openairdocs.org/ntsb/DEN74DTC40.md): Champion 7GCBC · Lingle, WY · Accident · Minor injuries · Closed · Jun 28, 1974 · N5138X · Substantial damage ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c."mKey" AND a.position = 1 WHERE c."eventStateOrRegion" = 'WY' AND c."eventCountry" = 'USA' AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('99999')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb?engine=99999&state=WY --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.